strange word varable array results


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  1. #1
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    Default strange word varable array results

    Hi Guys

    i been looking at this for a while and i cant see why i am getting the results i am

    put simply i have an array of 6 words , which are cleared at the start

    i copy a byte into lowbyte of word0 and a byte into highbyte of word0
    the word0 result is as expect , and shows correctly on the terminal (84dec)
    the word0 is also shown as high and low byte , which is also correct

    to test the other word varables i copy the word0 to , word1,2,3,4,5
    i then display the word 0-5 on the terminal as well as the high and low bytes of each word

    problem i am seeing is that

    word1 ,word3, word5 have the correct word value ,
    however when showing the the high and lowbytes of that same word , in the same line the high byte and low byte is reversed

    got me stumped

    this is debug code as i have been seeing this same error on both the terminal and a graphics display

    any advise


    cheers

    sheldon
    [CODE]

    if RXpayload_Code = 3 then ' RXpayload Code 3 variables for indexing

    Gate_Firm_Rev[z] = 0 ' clear selected varable
    Gate_Hard_Rev[z] = 0
    Gate_Firm_Rev.lowbyte [z] = RX_payload[1] ' Indexed Gate Firmware revison lowbyte
    Gate_Firm_Rev.highbyte[z] = RX_payload[2] ' Indexed Gate Firmware revison highbyte
    Gate_Hard_Rev.lowbyte[z] = RX_payload[3] ' indexed gate hardware revision lowbyte
    Gate_Hard_Rev.highbyte[z] = RX_payload[4] ' indexed gate hardware revision highbyte
    HSEROUT ["z = ",dec z , " GateID_word[z] = ",dec GateID_word[z] ," Gate_Firm_Rev[z] = ",DEC Gate_Firm_Rev[z],13,10,10,10] 'debug

    Gate_Firm_Rev[1] = Gate_Firm_Rev[0]
    Gate_Firm_Rev[2] = Gate_Firm_Rev[0]
    Gate_Firm_Rev[3] = Gate_Firm_Rev[0]
    Gate_Firm_Rev[4] = Gate_Firm_Rev[0]
    Gate_Firm_Rev[5] = Gate_Firm_Rev[0]
    HSEROUT [" 0. GateID_word[0] = ",dec GateID_word[0] ," Gate_Firm_Rev[0] = ",DEC Gate_Firm_Rev[0]," Gate_Firm_Rev.highbyte[0] = ",DEC Gate_Firm_Rev.highbyte[0] ," Gate_Firm_Rev.lowbyte{0} = ",DEC Gate_Firm_Rev.lowbyte[0] ,13,10,10,10 ] 'debug
    HSEROUT [" 1. GateID_word[1] = ",dec GateID_word[1] ," Gate_Firm_Rev[1] = ",DEC Gate_Firm_Rev[1]," Gate_Firm_Rev.highbyte[1] = ",DEC Gate_Firm_Rev.highbyte[1] ," Gate_Firm_Rev.lowbyte{1} = ",DEC Gate_Firm_Rev.lowbyte[1] ,13,10,10,10 ] 'debug
    HSEROUT [" 2. GateID_word[2] = ",dec GateID_word[2] ," Gate_Firm_Rev[2] = ",DEC Gate_Firm_Rev[2]," Gate_Firm_Rev.highbyte[2] = ",DEC Gate_Firm_Rev.highbyte[2] ," Gate_Firm_Rev.lowbyte{2} = ",DEC Gate_Firm_Rev.lowbyte[2] ,13,10,10,10 ] 'debug
    HSEROUT [" 3. GateID_word[3] = ",dec GateID_word[3] ," Gate_Firm_Rev[3] = ",DEC Gate_Firm_Rev[3]," Gate_Firm_Rev.highbyte[3] = ",DEC Gate_Firm_Rev.highbyte[3] ," Gate_Firm_Rev.lowbyte{3} = ",DEC Gate_Firm_Rev.lowbyte[3] ,13,10,10,10 ] 'debug
    HSEROUT [" 4. GateID_word[4] = ",dec GateID_word[4] ," Gate_Firm_Rev[4] = ",DEC Gate_Firm_Rev[4]," Gate_Firm_Rev.highbyte[4] = ",DEC Gate_Firm_Rev.highbyte[4] ," Gate_Firm_Rev.lowbyte{4} = ",DEC Gate_Firm_Rev.lowbyte[4] ,13,10,10,10 ] 'debug
    HSEROUT [" 5. GateID_word[5] = ",dec GateID_word[5] ," Gate_Firm_Rev[5] = ",DEC Gate_Firm_Rev[5]," Gate_Firm_Rev.highbyte[5] = ",DEC Gate_Firm_Rev.highbyte[5] ," Gate_Firm_Rev.lowbyte{5} = ",DEC Gate_Firm_Rev.lowbyte[5] ,13,10,10,10 ] 'debug
    endif

    /CODE]

    Code:
    z = 0  GateID_word[z] = 10  Gate_Firm_Rev[z] = 84
    
    
     0.                GateID_word[0] = 10  Gate_Firm_Rev[0] = 84  Gate_Firm_Rev.highbyte[0] = 0  Gate_Firm_Rev.lowbyte{0} = 84
    
    
     1.                GateID_word[1] = 0  Gate_Firm_Rev[1] = 84  Gate_Firm_Rev.highbyte[1] = 84  Gate_Firm_Rev.lowbyte{1} = 0
    
    
     2.                GateID_word[2] = 0  Gate_Firm_Rev[2] = 84  Gate_Firm_Rev.highbyte[2] = 0  Gate_Firm_Rev.lowbyte{2} = 84
    
    
     3.                GateID_word[3] = 0  Gate_Firm_Rev[3] = 84  Gate_Firm_Rev.highbyte[3] = 84  Gate_Firm_Rev.lowbyte{3} = 0
    
    
     4.                GateID_word[4] = 0  Gate_Firm_Rev[4] = 84  Gate_Firm_Rev.highbyte[4] = 0  Gate_Firm_Rev.lowbyte{4} = 84
    
    
     5.                GateID_word[5] = 0  Gate_Firm_Rev[5] = 84  Gate_Firm_Rev.highbyte[5] = 84  Gate_Firm_Rev.lowbyte{5} = 0

  2. #2
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    Default Re: strange word varable array results

    never struck that before looks like var[].highbyte and var[].lowbyte upsets things

    ;pic18f45k20
    Code:
     #CONFIG
      CONFIG  FOSC = INTIO67
      CONFIG  FCMEN = OFF
      CONFIG  IESO = OFF
      CONFIG  PWRT = OFF
      CONFIG  BOREN = SBORDIS
      CONFIG  BORV = 18
      CONFIG  WDTEN = ON
      CONFIG  WDTPS = 512
      CONFIG  CCP2MX = PORTC
      CONFIG  PBADEN = OFF
      CONFIG  LPT1OSC = OFF
      CONFIG  HFOFST = ON
      CONFIG  MCLRE = ON
      CONFIG  STVREN = ON
      CONFIG  LVP = OFF
      CONFIG  XINST = OFF
      CONFIG  DEBUG = OFF
      CONFIG  CP0 = OFF
      CONFIG  CP1 = OFF
      CONFIG  CP2 = OFF
      CONFIG  CP3 = OFF
      CONFIG  CPB = OFF
      CONFIG  CPD = OFF
      CONFIG  WRT0 = OFF
      CONFIG  WRT1 = OFF
      CONFIG  WRT2 = OFF
      CONFIG  WRT3 = OFF
      CONFIG  WRTC = OFF
      CONFIG  WRTB = OFF
      CONFIG  WRTD = OFF
      CONFIG  EBTR0 = OFF
      CONFIG  EBTR1 = OFF
      CONFIG  EBTR2 = OFF
      CONFIG  EBTR3 = OFF
      CONFIG  EBTRB = OFF
    #ENDCONFIG
    
      define OSC 64
     osccon=$70   '64 mhz
     OSCTUNE.6=1
     
     
     
     pause 2000
     
    Serout2 PORTb.7,84,["ready",13,10] 
     
     
     
     
     
     
     
     
     Gate_Firm_Rev var word[6]
     Gate_Hard_Rev  var word[6] 
     GateID_word     var word[6] 
     z var byte
     x var word
     RX_payload var byte[4]
     RX_payload[1] =84
     RX_payload[2] =0
     RX_payload[3] =0
     RX_payload[4] =0
     GateID_word[0] =10
     z=0
     
     
     Gate_Firm_Rev[z] = 0 ' clear selected varable
     Gate_Hard_Rev[z] = 0 
     Gate_Firm_Rev.lowbyte [z] = RX_payload[1] ' Indexed Gate Firmware revison lowbyte
     Gate_Firm_Rev.highbyte[z] = RX_payload[2] ' Indexed Gate Firmware revison highbyte 
     Gate_Hard_Rev.lowbyte[z] = RX_payload[3] ' indexed gate hardware revision lowbyte
     Gate_Hard_Rev.highbyte[z] = RX_payload[4] ' indexed gate hardware revision highbyte
    Serout2 PORTb.7,84, ["z = ",dec z , " GateID_word[z] = ",dec GateID_word[z] ," Gate_Firm_Rev[z] = ",DEC Gate_Firm_Rev[z],13,10,10,10] 'debug 
     x=  Gate_Firm_Rev[0]
     Gate_Firm_Rev[1] = x
     Gate_Firm_Rev[2] = x
     Gate_Firm_Rev[3] = x
     Gate_Firm_Rev[4] = x
     Gate_Firm_Rev[5] = x
     Serout2 PORTb.7,84, [" 0. GateID_word[0] = ",dec GateID_word[0] ," Gate_Firm_Rev[0] = ",DEC Gate_Firm_Rev[0]," Gate_Firm_Rev.highbyte[0] = ",DEC Gate_Firm_Rev.highbyte[0] ," Gate_Firm_Rev.lowbyte{0} = ",DEC Gate_Firm_Rev.lowbyte[0] ,13,10,10,10 ] 'debug
     Serout2 PORTb.7,84, [" 1. GateID_word[1] = ",dec GateID_word[1] ," Gate_Firm_Rev[1] = ",DEC Gate_Firm_Rev[1]," Gate_Firm_Rev.highbyte[1] = ",DEC Gate_Firm_Rev.highbyte[1] ," Gate_Firm_Rev.lowbyte{1} = ",DEC Gate_Firm_Rev.lowbyte[1] ,13,10,10,10 ] 'debug
     Serout2 PORTb.7,84, [" 2. GateID_word[2] = ",dec GateID_word[2] ," Gate_Firm_Rev[2] = ",DEC Gate_Firm_Rev[2]," Gate_Firm_Rev.highbyte[2] = ",DEC Gate_Firm_Rev.highbyte[2] ," Gate_Firm_Rev.lowbyte{2} = ",DEC Gate_Firm_Rev.lowbyte[2] ,13,10,10,10 ] 'debug
     Serout2 PORTb.7,84, [" 3. GateID_word[3] = ",dec GateID_word[3] ," Gate_Firm_Rev[3] = ",DEC Gate_Firm_Rev[3]," Gate_Firm_Rev.highbyte[3] = ",DEC Gate_Firm_Rev.highbyte[3] ," Gate_Firm_Rev.lowbyte{3} = ",DEC Gate_Firm_Rev.lowbyte[3] ,13,10,10,10 ] 'debug
     Serout2 PORTb.7,84, [" 4. GateID_word[4] = ",dec GateID_word[4] ," Gate_Firm_Rev[4] = ",DEC Gate_Firm_Rev[4]," Gate_Firm_Rev.highbyte[4] = ",DEC Gate_Firm_Rev.highbyte[4] ," Gate_Firm_Rev.lowbyte{4} = ",DEC Gate_Firm_Rev.lowbyte[4] ,13,10,10,10 ] 'debug
     Serout2 PORTb.7,84, [" 5. GateID_word[5] = ",dec GateID_word[5] ," Gate_Firm_Rev[5] = ",DEC Gate_Firm_Rev[5]," Gate_Firm_Rev.highbyte[5] = ",DEC Gate_Firm_Rev.highbyte[5] ," Gate_Firm_Rev.lowbyte{5} = ",DEC Gate_Firm_Rev.lowbyte[5] ,13,10,10,10 ] 'debug
     Serout2 PORTb.7,84, [" Gate_Firm_Rev.highbyte[5] = ",DEC Gate_Firm_Rev[0]/256 ," Gate_Firm_Rev.lowbyte{5} = ",DEC Gate_Firm_Rev[0]//256 ,13,10,10,10 ] 'debug
     Serout2 PORTb.7,84, [" Gate_Firm_Rev.highbyte[5] = ",DEC Gate_Firm_Rev[1]/256 ," Gate_Firm_Rev.lowbyte{5} = ",DEC Gate_Firm_Rev[1]//256 ,13,10,10,10 ] 'debug
     Serout2 PORTb.7,84, [" Gate_Firm_Rev.highbyte[5] = ",DEC Gate_Firm_Rev[2]/256 ," Gate_Firm_Rev.lowbyte{5} = ",DEC Gate_Firm_Rev[2]//256 ,13,10,10,10 ] 'debug
     Serout2 PORTb.7,84, [" Gate_Firm_Rev.highbyte[5] = ",DEC Gate_Firm_Rev[3]/256 ," Gate_Firm_Rev.lowbyte{5} = ",DEC Gate_Firm_Rev[3]//256 ,13,10,10,10 ] 'debug
     Serout2 PORTb.7,84, [" Gate_Firm_Rev.highbyte[5] = ",DEC Gate_Firm_Rev[4]/256 ," Gate_Firm_Rev.lowbyte{5} = ",DEC Gate_Firm_Rev[4]//256 ,13,10,10,10 ] 'debug
     Serout2 PORTb.7,84, [" Gate_Firm_Rev.highbyte[5] = ",DEC Gate_Firm_Rev[5]/256 ," Gate_Firm_Rev.lowbyte{5} = ",DEC Gate_Firm_Rev[5]//256 ,13,10,10,10 ] 'debug
    result

    ready
    z = 0 GateID_word[z] = 10 Gate_Firm_Rev[z] = 84

    0. GateID_word[0] = 10 Gate_Firm_Rev[0] = 84 Gate_Firm_Rev.highbyte[0] = 0 Gate_Firm_Rev.lowbyte{0} = 84

    1. GateID_word[1] = 0 Gate_Firm_Rev[1] = 84 Gate_Firm_Rev.highbyte[1] = 84 Gate_Firm_Rev.lowbyte{1} = 0

    2. GateID_word[2] = 16367 Gate_Firm_Rev[2] = 84 Gate_Firm_Rev.highbyte[2] = 0 Gate_Firm_Rev.lowbyte{2} = 84

    3. GateID_word[3] = 0 Gate_Firm_Rev[3] = 84 Gate_Firm_Rev.highbyte[3] = 84 Gate_Firm_Rev.lowbyte{3} = 0

    4. GateID_word[4] = 63744 Gate_Firm_Rev[4] = 84 Gate_Firm_Rev.highbyte[4] = 0 Gate_Firm_Rev.lowbyte{4} = 84

    5. GateID_word[5] = 49026 Gate_Firm_Rev[5] = 84 Gate_Firm_Rev.highbyte[5] = 84 Gate_Firm_Rev.lowbyte{5} = 0

    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 84

    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 84

    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 84

    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 84

    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 84

    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 84

  3. #3
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    Default Re: strange word varable array results

    using this bit
    x= Gate_Firm_Rev[0]
    Gate_Firm_Rev[1] = x +1
    Gate_Firm_Rev[2] = x +2
    Gate_Firm_Rev[3] = x +3
    Gate_Firm_Rev[4] = x +4
    Gate_Firm_Rev[5] = x +5

    changes the output more disturbingly to this


    z = 0 GateID_word[z] = 10 Gate_Firm_Rev[z] = 84


    0. GateID_word[0] = 10 Gate_Firm_Rev[0] = 84 Gate_Firm_Rev.highbyte[0] = 0 Gate_Firm_Rev.lowbyte{0} = 84


    1. GateID_word[1] = 8479 Gate_Firm_Rev[1] = 85 Gate_Firm_Rev.highbyte[1] = 85 Gate_Firm_Rev.lowbyte{1} = 0


    2. GateID_word[2] = 16367 Gate_Firm_Rev[2] = 86 Gate_Firm_Rev.highbyte[2] = 0 Gate_Firm_Rev.lowbyte{2} = 85


    3. GateID_word[3] = 65281 Gate_Firm_Rev[3] = 87 Gate_Firm_Rev.highbyte[3] = 86 Gate_Firm_Rev.lowbyte{3} = 0


    4. GateID_word[4] = 63744 Gate_Firm_Rev[4] = 88 Gate_Firm_Rev.highbyte[4] = 0 Gate_Firm_Rev.lowbyte{4} = 86


    5. GateID_word[5] = 32640 Gate_Firm_Rev[5] = 89 Gate_Firm_Rev.highbyte[5] = 87 Gate_Firm_Rev.lowbyte{5} = 0


    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 84


    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 85


    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 86


    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 87


    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 88


    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 89


    the indexing is corrupted

  4. #4
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    Default Re: strange word varable array results

    its the first i seen of this problem , and i have alot of indexed bytes but this is the first of indexed words where i have noticed it when doing bad things highbyte and lowbyte are reveresed and only on words of 1,3,5, they are fine for word 0,2,4,

  5. #5
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    Default Re: strange word varable array results

    same result when using byte1, byte0 in place of highbyte and lowbyte on indexed words

  6. #6
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    Default Re: strange word varable array results

    its not corruption its just an unexpected way of array referencing the bytes are not!!! reversed at all look more closely at post #3

    it appears that single byte extraction of word arrays causes the array indexing to become as byte sized therefore
    to extract a byte from a word array element using .highbyte/.lowbyte (.byte0/.byte1) you need to multiply the element index x 2

    i think its best avoided but it does work
    eg
    var[0] = var[0].byte0/var[0].byte1
    var[1] = var[2].byte0/var[2].byte1
    var[2] = var[4].byte0/var[4].byte1

    x= Gate_Firm_Rev[0]
    Gate_Firm_Rev[1] = x +1
    Gate_Firm_Rev[2] = x +2
    Gate_Firm_Rev[3] = x +3
    Gate_Firm_Rev[4] = x +4
    Gate_Firm_Rev[5] = x +5
    Serout2 PORTb.7,84, [" 0. GateID_word[0] = ",dec GateID_word[0] ," Gate_Firm_Rev[0] = ",DEC Gate_Firm_Rev[0]," Gate_Firm_Rev.highbyte[0] = ",DEC Gate_Firm_Rev.BYTE1[0] ," Gate_Firm_Rev.lowbyte{0} = ",DEC Gate_Firm_Rev.BYTE0[0] ,13,10,10,10 ] 'debug
    Serout2 PORTb.7,84, [" 1. GateID_word[1] = ",dec GateID_word[1] ," Gate_Firm_Rev[1] = ",DEC Gate_Firm_Rev[1]," Gate_Firm_Rev.highbyte[1] = ",DEC Gate_Firm_Rev.BYTE1[2] ," Gate_Firm_Rev.lowbyte{1} = ",DEC Gate_Firm_Rev.BYTE0[2] ,13,10,10,10 ] 'debug
    Serout2 PORTb.7,84, [" 2. GateID_word[2] = ",dec GateID_word[2] ," Gate_Firm_Rev[2] = ",DEC Gate_Firm_Rev[2]," Gate_Firm_Rev.highbyte[2] = ",DEC Gate_Firm_Rev.BYTE1[4] ," Gate_Firm_Rev.lowbyte{2} = ",DEC Gate_Firm_Rev.BYTE0[4] ,13,10,10,10 ] 'debug
    Serout2 PORTb.7,84, [" 3. GateID_word[3] = ",dec GateID_word[3] ," Gate_Firm_Rev[3] = ",DEC Gate_Firm_Rev[3]," Gate_Firm_Rev.highbyte[3] = ",DEC Gate_Firm_Rev.BYTE1[6] ," Gate_Firm_Rev.lowbyte{3} = ",DEC Gate_Firm_Rev.BYTE0[6] ,13,10,10,10 ] 'debug
    Serout2 PORTb.7,84, [" 4. GateID_word[4] = ",dec GateID_word[4] ," Gate_Firm_Rev[4] = ",DEC Gate_Firm_Rev[4]," Gate_Firm_Rev.highbyte[4] = ",DEC Gate_Firm_Rev.BYTE1[8] ," Gate_Firm_Rev.lowbyte{4} = ",DEC Gate_Firm_Rev.BYTE0[8] ,13,10,10,10 ] 'debug
    Serout2 PORTb.7,84, [" 5. GateID_word[5] = ",dec GateID_word[5] ," Gate_Firm_Rev[5] = ",DEC Gate_Firm_Rev[5]," Gate_Firm_Rev.highbyte[5] = ",DEC Gate_Firm_Rev.BYTE1[10] ," Gate_Firm_Rev.lowbyte{5} = ",DEC Gate_Firm_Rev.BYTE0[10] ,13,10,10,10 ] 'debug
    Serout2 PORTb.7,84, [" Gate_Firm_Rev.highbyte[5] = ",DEC Gate_Firm_Rev[0]/256 ," Gate_Firm_Rev.lowbyte{5} = ",DEC Gate_Firm_Rev[0]//256 ,13,10,10,10 ] 'debug
    Serout2 PORTb.7,84, [" Gate_Firm_Rev.highbyte[5] = ",DEC Gate_Firm_Rev[1]/256 ," Gate_Firm_Rev.lowbyte{5} = ",DEC Gate_Firm_Rev[1]//256 ,13,10,10,10 ] 'debug
    Serout2 PORTb.7,84, [" Gate_Firm_Rev.highbyte[5] = ",DEC Gate_Firm_Rev[2]/256 ," Gate_Firm_Rev.lowbyte{5} = ",DEC Gate_Firm_Rev[2]//256 ,13,10,10,10 ] 'debug
    Serout2 PORTb.7,84, [" Gate_Firm_Rev.highbyte[5] = ",DEC Gate_Firm_Rev[3]/256 ," Gate_Firm_Rev.lowbyte{5} = ",DEC Gate_Firm_Rev[3]//256 ,13,10,10,10 ] 'debug
    Serout2 PORTb.7,84, [" Gate_Firm_Rev.highbyte[5] = ",DEC Gate_Firm_Rev[4]/256 ," Gate_Firm_Rev.lowbyte{5} = ",DEC Gate_Firm_Rev[4]//256 ,13,10,10,10 ] 'debug
    Serout2 PORTb.7,84, [" Gate_Firm_Rev.highbyte[5] = ",DEC Gate_Firm_Rev[5]/256 ," Gate_Firm_Rev.lowbyte{5} = ",DEC Gate_Firm_Rev[5]//256 ,13,10,10,10 ] 'debug

    output

    ready
    z = 0 GateID_word[z] = 10 Gate_Firm_Rev[z] = 84


    0. GateID_word[0] = 10 Gate_Firm_Rev[0] = 84 Gate_Firm_Rev.highbyte[0] = 0 Gate_Firm_Rev.lowbyte{0} = 84


    1. GateID_word[1] = 8511 Gate_Firm_Rev[1] = 85 Gate_Firm_Rev.highbyte[1] = 0 Gate_Firm_Rev.lowbyte{1} = 85


    2. GateID_word[2] = 16367 Gate_Firm_Rev[2] = 86 Gate_Firm_Rev.highbyte[2] = 0 Gate_Firm_Rev.lowbyte{2} = 86


    3. GateID_word[3] = 65281 Gate_Firm_Rev[3] = 87 Gate_Firm_Rev.highbyte[3] = 0 Gate_Firm_Rev.lowbyte{3} = 87


    4. GateID_word[4] = 63752 Gate_Firm_Rev[4] = 88 Gate_Firm_Rev.highbyte[4] = 0 Gate_Firm_Rev.lowbyte{4} = 88


    5. GateID_word[5] = 49026 Gate_Firm_Rev[5] = 89 Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 89


    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 84


    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 85


    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 86


    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 87


    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 88


    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 89
    Last edited by richard; - 14th April 2015 at 12:59. Reason: POST 3

  7. #7
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    Default Re: strange word varable array results

    is this a bug for 3.07 ?
    and why only for indexed words of 1,3,5 and not 0,2,4 ?

  8. #8
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    Default Re: strange word varable array results

    YOUR not picking up on what i.m saying
    is this a bug for 3.07 ?
    no

    and why only for indexed words of 1,3,5 and not 0,2,4 ?
    WRONG it is wrong for any index but 0
    look at post#3 output


    0. GateID_word[0] = 10 Gate_Firm_Rev[0] = 84 Gate_Firm_Rev.highbyte[0] = 0 Gate_Firm_Rev.lowbyte{0} = 84


    1. GateID_word[1] = 8479 Gate_Firm_Rev[1] = 85 Gate_Firm_Rev.highbyte[1] = 85 Gate_Firm_Rev.lowbyte{1} = 0


    2. GateID_word[2] = 16367 Gate_Firm_Rev[2] = 86 Gate_Firm_Rev.highbyte[2] = 0 Gate_Firm_Rev.lowbyte{2} = 85


    3. GateID_word[3] = 65281 Gate_Firm_Rev[3] = 87 Gate_Firm_Rev.highbyte[3] = 86 Gate_Firm_Rev.lowbyte{3} = 0


    4. GateID_word[4] = 63744 Gate_Firm_Rev[4] = 88 Gate_Firm_Rev.highbyte[4] = 0 Gate_Firm_Rev.lowbyte{4} = 86


    5. GateID_word[5] = 32640 Gate_Firm_Rev[5] = 89 Gate_Firm_Rev.highbyte[5] = 87 Gate_Firm_Rev.lowbyte{5} = 0


    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 84


    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 85


    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 86


    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 87


    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 88


    Gate_Firm_Rev.highbyte[5] = 0 Gate_Firm_Rev.lowbyte{5} = 89

  9. #9
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    Default Re: strange word varable array results

    found this in the pbp3 book

    One more note about array variables. The modifiers associated with scalar
    variables can't be used with array variables:
    stored[1].BYTE0 = 0 'ERROR

    "if all else fails"

  10. #10
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    Default Re: strange word varable array results

    I remember having had something like that with a Pic 18 chip, some years ago ...

    Melanie ( or Darrel ??? ) kindly explained me that ... the thread must still be on the Forum.

    as a result ... I only used odd locations ...

    - and it worked fine !!! -

    Alain
    ************************************************** ***********************
    Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
    ************************************************** ***********************
    IF there is the word "Problem" in your question ...
    certainly the answer is " RTFM " or " RTFDataSheet " !!!
    *****************************************

  11. #11
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    Default Re: strange word varable array results

    Hi,
    On top of turning to the manual, whenever it comes to bits, bytes, words and arrays you should reference Melaines excellent writeup on the subject. For this particullar topic, look at section 5.

    /Henrik.

  12. #12
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    Default Re: strange word varable array results

    thanks guys ,


    i lost a lot a time finding out the hardway ,
    fortunatly the the indexed arrays i have so far are byte only

    except for 2 which are word , and only this one had used the myvarable.highbyte to try get data , which need to be changed

    looking at Melanie example ( thanks for the link hendrick )

    5. How can I reference a BYTE in a WORD ARRAY?

    As can be previously seen, all the bits in an array are stored sequentially in memory. It follows that the BYTES in a WORD ARRAY also follow sequentially. This means we can easily extract any BYTE we want to out of a WORD Array in a similar manner. Consider again…

    MyWordArray var WORD [25]

    There are actually 50 Bytes in this array (0-49). The first byte (0) being the LOWBYTE of MywordArray(0), and the last byte (49) being the HIGHBYTE of MyWordArray(24). Using a similar manner to Bit access, we can access all fifty Bytes of this Word array like so…

    MyWordArray.Lowbyte(MyVar)

    Where MyVar is in the range 0-49 for my previously defined example Array of 25 Words.

    This is really handy, because we can use this method of loading or unloading Word Arrays from EEPROM for example very easily.

    Note that HIGHBYTE cannot be used in this instance, because it cannot access the LowByte of the first array element… ie..

    MyWordArray.HighByte(0)=MywordArray.LowByte(1)
    all the way to…
    MyWordArray.HighByte(48)=MywordArray.LowByte(49)

    More dangerously, MyWordArray.HighByte(49) will actually perform an unauthorised access on an unknown byte OUTSIDE the MyWordArray structure.

    Melanie

  13. #13
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    Default Re: strange word varable array results

    so for me getting the data into the word index array

    myword_tmp.lowbyte = byte0
    myword_tmp.highbyte = byte1

    myword_index(X) = myword_tmp

    --------------
    getting is out

    for x = 0 to 5 ' index var 6 words

    hserout [" highbyte = " myword_index.lowbyte[X*2 +1] , "lowbyte = " , myword_index.lowbyte[X*2 ] ,13,10]

    next x

  14. #14
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    Default Re: strange word varable array results

    for what is worth I think my way is more readable

    hserout [" highbyte = " myword_index.[X*2 ].highbyte , "lowbyte = " , myword_index.[X*2 ].lowbyte ,13,10]

  15. #15
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    Default Re: strange word varable array results

    simple byte swap , but what have i missed getting rubbish o0n the word variable

    Code:
      SDC_buffer[250] = GateID_word.lowbyte[T*2+1]  'indexed highbyte                       ' copy the varables to tmp varable   
                 SDC_buffer[251] = GateID_word.lowbyte[T*2]    'indexed lowbyte                             
                 SDC_buffer[252] = Gate_CH_V_Num[T] 
                 SDC_buffer[253] = Gate_RX_Sens_Trig[T]    
                 SDC_buffer[254] = Gate_Prod_Bat_Lvl[T]                                                   
                 
                 GateID_word[T]       = GateID_word[T+1]                          ' copy index varables to neighbors next index  
                 Gate_CH_V_Num[T]     = Gate_CH_V_Num[T+1] 
                 Gate_RX_Sens_Trig[T] = Gate_RX_Sens_Trig[T+1]    
                 Gate_Prod_Bat_Lvl[T] = Gate_Prod_Bat_Lvl[T+1]          
              
                 GateID_word.lowbyte[(T*2+1)+1] = SDC_buffer[250]   ' indexed highbyte +1                  ' copy temp varables to next index  
                 GateID_word.lowbyte[(T*2)  +1] = SDC_buffer[251]   ' indexed lowbyte  +1                      
                 Gate_CH_V_Num[T+1]      = SDC_buffer[252]  
                 Gate_RX_Sens_Trig[T+1]  = SDC_buffer[253]      
                 Gate_Prod_Bat_Lvl[T+1]  = SDC_buffer[254]

  16. #16
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    Default Re: strange word varable array results

    i could make it easy by copy to word temp and back but i should not have to

  17. #17
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    Default Re: strange word varable array results

    What version of PBP you use?

  18. #18
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    Default Re: strange word varable array results

    i changed to use a tmp word but it looks like it should work , index variable word to bytes and back

    3.07.1

  19. #19
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    Default Re: strange word varable array results

    If you are using PIC18F, updating to 3.08 may solve you problem.
    I had similar problem, and it was bug in PBP. Bug was fixed in PBP3.08.
    http://www.pbp3.com/download.html
    So give it a try...

  20. #20
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    Default Re: strange word varable array results

    Code:
       GateID_word.lowbyte[(T*2+1)+1] = SDC_buffer[250]   ' indexed highbyte +1                  ' copy temp varables to next index  
                 GateID_word.lowbyte[(T*2)  +1] = SDC_buffer[251]   ' indexed lowbyte  +1


    should be

    Code:
       GateID_word.lowbyte[(T*2+1)+2] = SDC_buffer[250]   ' indexed highbyte +1                  ' copy temp varables to next index  
                 GateID_word.lowbyte[(T*2)  +2] = SDC_buffer[251]   ' indexed lowbyte  +1

  21. #21
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    Default Re: strange word varable array results

    yep thanks richard could not see it

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